GLEN CANYON DAM
OperatingHydro power plant
- Capacity
- 1,312 MW
- Primary fuel
- Hydro
- County
- Coconino County
- Operator
- U S BUREAU OF RECLAMATION
- Status
- Operating
- Commissioned
- 1964
- EIA plant ID
- 153
- Generators
- 8
- Technology
- Conventional Hydroelectric
- Net generation (2024)
- 2,691 GWh
- Capacity factor (2024, EIA nameplate)
- 23%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 36.9366, -111.4839
GLEN CANYON DAM, a 1,312 MW Hydro power plant in Coconino County, Arizona. Operated by U S BUREAU OF RECLAMATION, commissioned 1964.
How GLEN CANYON DAM compares
With 1,312 MW of capacity, GLEN CANYON DAM ranks 5th among the 71 operating power plants Bywatts maps in Arizona and is the largest of the 9 operating Hydro plants in the state. It accounts for about 45% of Arizona's operating Hydro capacity and 4.5% of all operating capacity in the state. Nationally it is the 10th-largest of the 1,243 operating Hydro plants in the database. Commissioned in 1964, it is older than 82% of the 69 operating Arizona plants with a recorded commissioning year. Its operator, U S BUREAU OF RECLAMATION, runs 3 operating plants in Arizona totaling 2,607 MW. It shares Coconino County with one other operating plant, PERRIN RANCH WIND LLC.
EIA-860 lists 8 generators at the site with 1,312 MW of nameplate capacity, all conventional hydroelectric technology. Net generation was 2,691 GWh in 2024 (a 23% capacity factor), up 6% from 2022. Its generators came online between 1964 and 1966.
Grid neighborhood
The nearest named substation is GLEN CANYON (345 kV), about 0.3 miles away; the closest transmission line found within 10 miles is a 138 kV line owned by GARKANE ENERGY COOP, INC, about 0.3 miles away.
Computed by Bywatts from HIFLD power plant, substation and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology
Weather peril exposure
GLEN CANYON DAM is a 1,312 MW hydro power plant in Coconino County, AZ, operated by U S BUREAU OF RECLAMATION, commissioned in 1964. Coconino County carries moderate modeled catastrophe exposure in the FEMA National Risk Index, scoring 2.2 of 5 at the 29th national percentile. Wildfire is the leading peril, rated Relatively High by FEMA at the 98th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a hydro plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Coconino County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Wildfire | Relatively High | 98th | 4.9 of 5 | 0.01 |
| Riverine flooding | Relatively High | 95th | 4.8 of 5 | 8.0 |
| Earthquake | Relatively Moderate | 82nd | 4.3 of 5 | <0.01 |
| Hail | Relatively Low | 28th | 2.1 of 5 | 0.21 |
| Winter weather | Very High | 18th | 1.7 of 5 | 8.2 |
| Lightning | Very High | 15th | 1.6 of 5 | 44.4 |
| Heat wave | Relatively Low | 13th | 1.5 of 5 | 1.5 |
| Tornado | Very Low | 11th | 1.4 of 5 | 0.81 |
| Strong wind | Very Low | 2nd | 1.1 of 5 | 0.07 |
| Ice storm | Relatively Low | 1st | 1.0 of 5 | 0.01 |
Perils not assessed in Coconino County
These perils carry no usable National Risk Index figure for this county, so they are excluded from the scoring rather than scored zero. A zero would claim the peril was assessed and found benign.
| Peril | Why it is not scored |
|---|---|
| Hurricane | FEMA rating is "No Rating" for this county |
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for Coconino County in the weather risk calculator
Ratings are the FEMA National Risk Index county hazard ratings; the peril score is a Bywatts transform of the FEMA national percentile. Full data sources and the solar vulnerability methodology are in the weather risk calculator.
Modeled estimate for screening and negotiation. Built from FEMA National Risk Index county hazard data and a solar vulnerability layer documented above. Not a quote, a binder, or actuarial advice, and not a substitute for a carrier's own model. Hazard data: FEMA National Risk Index December 2025, synced 2026-07-24. Resolution is county level, not site level.